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A solar cell generates a potential difference of 0.1556 V when a 500 ? resistor is connected across it, and a potential difference of 0.2270 V when a 1000 ? resistor is substituted. What is the internal resistance of the solar cell? What is the emf of the solar cell? The area of the cell is 5.0 cm2, and the rate per unit area at which it receives energy from light is 2.0m W/ cm2. What is the efficiency of the cell for converting the light energy to thermal energy in the 1000 ? external resistor? (percent = Do not enter a unit)
A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates, Determine the work done by the net external force acting on the skier
A 56.0 kg cheerleader uses an oil-filled hydraulic lift to hold four 120 kg football players at a height of 0.900m. what is the diameter of the football players' piston
A 2.0 kg, 20-cm-diameter turntable rotates at 100 rpm on frictionless bearings. Two 500 g blocks fall from above, What is the turntable's angular speed
A parallel-plate capacitor with area 0.100 m2 and plate separation of 4.00 mm is connected to a 21.00 V battery. Find the magnitude of the charge density on each plate
Suppose Fuzzy, a quantum-mechanical duck, lives in a world in which h = 2πJ • s. Fuzzy has a mass of 2.00 kg and is at first known to be within a pond 1.00 m wide.
Jim's dog Sparky runs 45.0 northeast to a tree, then 75.0 west to a second tree, and finally 15.0 south to a third tree. Calculate the direction of Sparky's net displacement
The spin cycles of a washing machine have two angular speeds, 408rev/min and 648rev/min. Find the laundry's maximum radial acceleration
A 3.0-kg block is pulled along a FRICTIONLESS surface with a force of 42N. Attached to that block with a light string is another 3.0-kg block. what is the tension in the string
A 1 550-kg automobile has a wheel base (the distance between the axles) of 2.80 m. Find the force exerted by the ground on each wheel
A 76 g, 31 cm long road hang vertically on frictionless horizontal axle passing through its center a 10 gram ball of clay travelling horizontally at 2.6m/s hits and stick to the very bottom tip of the rod. To what maximum angle, measured from ..
A small rock with mass 0.200 kg is fastened to a massless string with length 0.750 m to form a pendulum. What is tension in the string at the lowest point
a ball of radius 20.0 cm rolls from rest dawn a ramp, how many revolutions does the ball make while it is in the air
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